# Open OnDemand

Open OnDemand (OOD) is a web portal to the Oscar computing cluster. **An Oscar account is required to access Open OnDemand.** Visit this link in a web browser and sign in with your Brown username and password to access this portal.

## [Open on Demand](https://ood.ccv.brown.edu/)

## Intro to Open OnDemand Slides

{% embed url="<https://docs.google.com/presentation/d/1TVkaYJ9bKsBl36j7peP91MDFS2hvgXA79KLgUpgACMs/edit?usp=sharing>" %}

OOD provides with a several resources for interacting with Oscar.

* Use the [File Explorer](https://docs.ccv.brown.edu/oscar/connecting-to-oscar/open-ondemand/using-file-explorer-on-ood) in the portal to view, copy, download or delete files on Oscar.
* Launch [interactive apps/softwares](https://docs.ccv.brown.edu/oscar/connecting-to-oscar/open-ondemand/interactive-apps-on-ood), like Matlab and Jupyter Notebook, inside your web browser.
* [Access the Oscar shell ](https://docs.ccv.brown.edu/oscar/connecting-to-oscar/open-ondemand/web-based-terminal-app)with your browser without needing a separate terminal emulator. This is especially handy for Windows users, since you do not need to install a separate program.

### Features:

1. No installation needed. Just use your favorite browser!
2. No need to enter your password again. [SSH into Oscar](https://docs.ccv.brown.edu/oscar/connecting-to-oscar/open-ondemand/web-based-terminal-app) in seconds!
3. No need to use two-factor authentication multiple times. Just do it once, when you log into OOD.
4. Use it with, or without, VPN. Your workflow remains the same.

## Common Issues

### My Session is in Undetermined State

Find the session ID ***\<undetermined\_session\_id>*** for the undetermined session. For example:

```
Session ID: f37466d7-c690-467b-85ce-8d250b3847d9"
```

Then Run

```bash
rm ~/ondemand/data/sys/dashboard/batch_connect/db/<undetermined_seesion_id>
```